<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>

<script>
    let student = {
        name : "student",
        age : 18,
        run : function () {
            console.log(this.name + " run...");
        }
    };

    let xiaoming = {
        name : "xiaoming"
    };

    xiaoming.__proto__ = student;
</script>

</body>
</html>